Page 78 - CITS - Welder - Trade Theory
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WELDER - CITS



           5  Water

           6  Baffle plate
           7  Purifying materials
           8  Filter wool
           9  Wire screen10 Bursting disc
           11 Pressure gauge
           12 Gas controlling tap

                     Fig 1


























           Working principle in normal stage: The acetylene gas from the carbide to water acetylene  generator enters
           through the inlet connection of the flash back arrestor and goes to water compartment through non, return space
           valve and baffle plate, filter wool. Baffle plate reduces the velocity of acetylene gas whereas the purifying materials
           purify the generated acetylene gas that goes to outlet through the regulator and gas controlling tap.
           Accidental Condition: Flash back from the blow pipe enters through the outlet connection in flashback arrestor
           and goes to the non-return valve through the filter wool, baffle plate and water. Flash back creates the pressure
           and pushes the water down wards when the ball of non-return valve comes down and closes the inlet acetylene
           gas with the help of the disc. With the result, no more gas enters inside the flash back arrestor.The acetylene gas
           which is already in the flask back arrest or burns due to this pressure, the bursting
































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 CITS : C G & M - Welder - Lesson 14-26  CITS : C G & M - Welder - Lesson 14-26
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